CodeWarrior: Floating to Node Locked license conversion

Hi CodeWarrior support! We're about to purchase CodeWarrior Development Studio for HCS12(X) Microcontrollers (Classic IDE) v5.2, Standard license but still hesitating between Floating and Node Locked type. We'd prefer Floating but our license server, running on Ubuntu 12.04, would be behind a firewall and we're not sure whether there will be difficulty for the connection to get through. Would it be possible that we buy Floating and if we could not solve the server authentication problem, convert the Floating to Node Locked license? Thanks.